期刊
GELS
卷 8, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/gels8110735
关键词
zwitterionic; gel; high-temperature resistance; salt- and calcium-resistant; fluid loss reducer
资金
- National Natural Science Foundation of China
- Key Core Technology Project of China National Petroleum Corporation
- Forward-looking Basic Strategic Technical Research Topics of China National Petroleum Corporation
- [52174016]
- [2020A-3913]
- [2021DJ4404]
- [2021DJ4407]
A novel type of zwitterionic polymer gel (DNDAP) was synthesized and used as a filtration loss reducer for drilling fluids in salt-gypsum formations. DNDAP exhibited excellent rheological and filtration properties in water-based drilling fluids, even under high-temperature and high salinity environments.
To control the filtration loss of drilling fluids in salt-gypsum formations, a novel type of zwitterionic polymer gel (DNDAP) was synthesized by free radical polymerization, which was used as a salt- and calcium-resistant fluid loss reducer for water-based drilling fluids (WBDF). DNDAP was prepared with N, N-dimethylacrylamide (DMAA), N-vinylpyrrolidone (NVP), Diallyl dimethyl ammonium chloride (DMDAAC), 2-acrylamide-2-methylpropaneonic acid (AMPS), and isopentenol polyether (TPEG) as raw materials. Fourier transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (H-1-NMR) were used to characterize the composition and structure of the DNDAP copolymer. The thermal stability of DNDAP was evaluated by the use of thermogravimetric analysis (TGA). WBDF with DNDAP was analyzed for zeta potential and particle size and the corresponding filter cake underwent energy dispersive spectrum (EDS) analysis and scanning electron microscope (SEM) analysis. The results showed that the thermal decomposition of DNDAP mainly occurred above 303 degrees C. DNDAP exhibits excellent rheological and filtration properties in water-based drilling fluids, even under high-temperature aging (up to 200 degrees C) and high salinity (20 wt% NaCl or 5 wt% CaCl2) environments. The strong adsorption effect of DNDAP makes the particle size of bentonite reasonably distributed to form a dense mud cake that reduces filtration losses.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据